Fatty acids in the human body appear as a particularly heterogeneous group of organic compounds. Such diversity is essential because of the role played by fatty acids in metabolism. Fatty acids are in fact a component of all cell structures. They are also substrates for other active compounds as well as an energy substrate. The mechanisms that mechanism specific metabolism of fatty acids such as elongation
and desaturation reactions or acid catabolism of cis and trans configurations are not yet fully explained. A fuller understanding of these mechanisms will help to understand pathomechanisms of several diseases that occur in different periods of human life.